Environmental Engineering

Proven Enviromental Management and Planning

Water Resources

Real-time water management decisions

Coastal Engineering

Impact analytics of human activities on coastal systems

Hydropower Engineering

Engineering and field support services for hydropower projects

Contaminated Sediments

Specialized studies of toxics fate and transport

Community Support

Using professional expertise to serve the community

Introduction

DSI is an engineering, planning, and research & development firm with its headquarters in the US. A Representative Office was established in Hanoi in 2002 to provide the international/national development agencies and international companies with focused and experienced technical and management support.

Consulting Services

DSI has over 30 years of experience in providing water resources planning, flooding analysis and control, reservoir systems, groundwater flow, toxics transport, and water quality consulting services. DSI offers considerable expertise on a worldwide basis in water resources and environmental projects.

Latest DSI News

Paul Craig, President of DSI, gave a presentation on Habitat Modeling at a dinner meeting for the Washington Section. Mr Craig demonstrated tools for supporting efforts to mitigate the impact of human development on fish habitat through enhancements to the physical habitat such as changes in substrate type and flow patterns. https://www.waawra.org/event-3018346

DSI is supporting Suncor and Hatfield to develop an EFDC model that is integrated with a HydroGeoSphere ground water model of the McClelland Lake Wetland Complex in Alberta, Canada. The goal is to develop a surface water model to represent the transport and fate of WQ constituents along the fen and into the lake.

DSI are supporting Alberta Environment and Parks with a detailed 2D hydrodynamic, sediment transport, toxics, and water quality model development for the Lower Athabasca River. This study will also include a fish habitat analysis and model sensitivity analysis.

The latest EFDC_Explorer Modeling System has been released, with EE8.4, EFDC+ and CVLGrid1.1 in one package. This update to DSI’s hydrodynamic, sediment transport and WQ modeling tool comes with many enhancements, including new habitat analysis tools (IFIM) and time and rule controlled hydraulic structures. A free Demo version is available for download.

DSI supporting the next phase of an evaluation of the Jacksonville Harbor Navigation Project for USACE. The study uses EFDC+ with Sigma-ZED for hydrodynamic and salinity modeling to evaluate changes to the salinity in the Lower St Johns River.

DSI recently successfully completed the study for a hydrodynamic and water quality model of the upper Little Bow River main stem, the Twin Valley Reservoir, and its tributary Mosquito Creek. DSI used EFDC for the set-up, calibration, validation and implementation of this in-stream water quality model for Alberta Environment and Parks.